:root {
    --primary-color: #4CAF50;
    --secondary-color: #2196F3;
    --danger-color: #ff4444;
    --border-color: #e0e0e0;
    --text-color: #333;
    --bg-light: #f8f9fa;
    --shadow: 0 2px 4px rgba(0,0,0,0.1);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
}

.container {
    display: flex;
    padding: 15px;
    gap: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

@media (max-width: 768px) {
    .container {
        flex-direction: column;
    }
}

.settings-panel {
    flex: 1;
    min-width: 250px;
}

.content-panel {
    flex: 2;
}

/* 改进的文本区域样式 */
.text-area {
    width: 100%;
    min-height: 100px;
    margin: 10px 0;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-family: inherit;
    resize: vertical;
    transition: var(--transition);
}

.text-area:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(76, 175, 80, 0.2);
}

/* 改进的折叠面板 */
.collapsible {
    cursor: pointer;
    padding: 12px 15px;
    background: var(--bg-light);
    border-radius: 8px;
    margin-bottom: 8px;
    transition: var(--transition);
    position: relative;
}

.collapsible::after {
    content: '';
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%) rotate(0deg);
    width: 10px;
    height: 10px;
    border-right: 2px solid #666;
    border-bottom: 2px solid #666;
    transition: var(--transition);
}

.collapsible.active::after {
    transform: translateY(-50%) rotate(45deg);
}

.content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
    padding: 0 15px;
}

.content.show {
    max-height: 1000px;
    padding: 15px;
}

/* 章节容器改进 */
.chapter-container {
    border: 1px solid var(--border-color);
    margin: 15px 0;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.chapter-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 15px;
    background: var(--bg-light);
    cursor: pointer;
    transition: var(--transition);
}

.chapter-header:hover {
    background: #eee;
}

.chapter-content {
    padding: 15px;
    transition: var(--transition);
}

/* 按钮样式改进 */
button {
    padding: 8px 16px;
    margin: 5px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 80px;
}

button:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.primary-button {
    background: var(--primary-color);
    color: white;
}

.secondary-button {
    background: var(--secondary-color);
    color: white;
}

.danger-button {
    background: var(--danger-color);
    color: white;
}

/* 辅助类 */
.mt-10 { margin-top: 10px; }
.mb-10 { margin-bottom: 10px; }
.hidden { display: none; }
.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.gap-5 { gap: 5px; }

/* 响应式调整 */
@media (max-width: 480px) {
    .container {
        padding: 10px;
    }
    
    button {
        width: 100%;
        margin: 5px 0;
    }
    
    .chapter-header {
        flex-direction: column;
        text-align: center;
    }
}

/* 动画类 */
.fade-in {
    animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* 模态框改进 */
.preview-modal {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: white;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    z-index: 10001;
    max-width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

/* 上下文菜单改进 */
.context-menu {
    position: fixed;
    z-index: 10000;
    background: white;
    border-radius: 8px;
    padding: 5px 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.context-menu-item {
    padding: 8px 20px;
    cursor: pointer;
    transition: var(--transition);
}

.context-menu-item:hover {
    background: var(--bg-light);
}

/* 信息提示框改进 */
.info-box {
    padding: 12px 15px;
    margin: 10px 0;
    background-color: #e3f2fd;
    border-left: 4px solid var(--secondary-color);
    border-radius: 8px;
}

.warning-box {
    padding: 12px 15px;
    margin: 10px 0;
    background-color: #fff3e0;
    border-left: 4px solid #ff9800;
    border-radius: 8px;
}





















/* 基础样式重置 */
.optimizer-panel *,
.floating-panel * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 主面板样式 */
.optimizer-panel {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 1000px;
    height: 600px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    display: flex;
    flex-direction: column;
    z-index: 1000;
    overflow: hidden;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* 面板头部 */
.panel-header {
    padding: 16px 20px;
    background: #f8f9fa;
    border-bottom: 1px solid #e9ecef;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.panel-header h3 {
    font-size: 18px;
    color: #343a40;
    font-weight: 600;
}

/* 面板主体 */
.panel-body {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    background: #ffffff;
}

/* 配置部分 */
.config-section {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 16px;
}

.config-section h4 {
    color: #495057;
    font-size: 16px;
    margin-bottom: 12px;
}

.config-row {
    display: flex;
    align-items: center;
    margin-bottom: 12px;
    gap: 12px;
}

/* 输入控件样式 */
input[type="number"],
input[type="text"],
select {
    padding: 8px 12px;
    border: 1px solid #ced4da;
    border-radius: 4px;
    font-size: 14px;
    width: 120px;
    transition: border-color 0.2s;
}

input[type="number"]:focus,
input[type="text"]:focus,
select:focus {
    border-color: #4dabf7;
    outline: none;
    box-shadow: 0 0 0 2px rgba(77, 171, 247, 0.2);
}

/* 帮助文本 */
.help-text {
    font-size: 13px;
    color: #6c757d;
    margin-left: 8px;
}

/* 分段预览容器 */
.segments-container {
    background: white;
    border: 1px solid #e9ecef;
    border-radius: 8px;
    padding: 16px;
    margin-top: 16px;
}

/* 分段项样式 */
.segment-item {
    background: #f8f9fa;
    border: 1px solid #e9ecef;
    border-radius: 6px;
    padding: 12px;
    margin-bottom: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.segment-item:hover {
    background: #e9ecef;
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.segment-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.segment-status {
    font-size: 13px;
    color: #6c757d;
    padding: 4px 8px;
    border-radius: 4px;
    background: #e9ecef;
}

.segment-item.optimized .segment-status {
    color: #2b8a3e;
    background: #d3f9d8;
}

/* 进度条样式 */
.progress-section {
    margin-top: 20px;
    padding: 16px;
    background: #f8f9fa;
    border-radius: 8px;
}

.progress-bar {
    height: 8px;
    background: #e9ecef;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 8px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #4dabf7 0%, #228be6 100%);
    transition: width 0.3s ease;
}

.progress-text {
    font-size: 14px;
    color: #495057;
    text-align: center;
}

/* 按钮样式 */
.close-btn {
    background: none;
    border: none;
    font-size: 24px;
    color: #868e96;
    cursor: pointer;
    padding: 4px;
    transition: color 0.2s;
}

.close-btn:hover {
    color: #495057;
}

.primary-btn,
.secondary-btn {
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
}

.primary-btn {
    background: #228be6;
    color: white;
}

.primary-btn:hover {
    background: #1c7ed6;
    transform: translateY(-1px);
}

.secondary-btn {
    background: #e9ecef;
    color: #495057;
}

.secondary-btn:hover {
    background: #dee2e6;
    transform: translateY(-1px);
}

/* 预览面板 */
.preview-panel {
    position: fixed;
    max-width: 400px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    padding: 16px;
    z-index: 1100;
}

.preview-content {
    font-size: 14px;
    line-height: 1.6;
    max-height: 300px;
    overflow-y: auto;
}

/* 结果面板 */
.result-panel {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    max-height: 80vh;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    z-index: 1050;
    display: flex;
    flex-direction: column;
}

.result-score {
    font-size: 18px;
    font-weight: 600;
    color: #212529;
    margin-bottom: 16px;
    padding: 12px;
    background: #f8f9fa;
    border-radius: 6px;
}

.score-value {
    color: #2b8a3e;
    margin-left: 8px;
}

.result-content,
.result-explanation {
    margin-bottom: 16px;
}

.content-area,
.explanation-area {
    background: #f8f9fa;
    border-radius: 6px;
    padding: 12px;
    font-size: 14px;
    line-height: 1.6;
    max-height: 300px;
    overflow-y: auto;
}

/* 响应式调整 */
@media (max-width: 1200px) {
    .optimizer-panel {
        width: 90%;
        height: 90vh;
    }

    .result-panel {
        width: 90%;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.optimizer-panel,
.result-panel,
.preview-panel {
    animation: fadeIn 0.3s ease;
}